Network Specifications

Cellular Features

European Version (RLTK421)

Cellular Features
Region	Europe
Cellular Network	Frequency Bands	FDD-LTE	B1/B3/B7/B8/B20/B28
		TDD-LTE	B38/B40/B41
		WCDMA	B1/B8
		GSM/GPRS/EDGE	B3/B8
	Theoretical Bandwidth	FDD-LTE	Max. 150 Mbps (DL) / 50 Mbps (UL)
		TDD-LTE	Max.135 Mbps (DL) / 35 Mbps (UL)
		WCDMA	Max. 42 Mbps (DL) / 5.76 Mbps (UL)
		GSM/GPRS/EDGE	Max. 384 kbps (DL) / 128 kbps (UL)

Global Version (RLTK421-G)

Cellular Features
Region	Global
Cellular Network	Frequency Bands	TDD-LTE	B34/38/39/40/41
		FDD-LTE	B1/2/3/4/5/7/8/12/13/18/19/20/25/26/28/66
		WCDMA	B1/2/4/5/6/8/19
		GPRS/EDGE	B2/3/5/8
	Theoretical Bandwidth	TDD-LTE	130 Mbps (DL) / 50 Mbps (UL)
		FDD-LTE	150 Mbps (DL) / 50 Mbps (UL)
		WCDMA	384 kbps (DL) / 384 kbps (UL)
		GPRS	107 kbps (DL) / 85.6 kbps (UL)
		EDGE	296 kbps (DL) / 236.8 kbps (UL)

Software Features

Software Features
Network Connection	WAN protocol	PPP, PPPoE, DHCP client
	LAN protocol	ARP, DHCP server, NAT
	4G network access	Automatic APN/VPDN, private network Authentication: CHAP/PAP
	WLAN security	Open system, WPA/WPA2 PSK, TKIP/AES encryption
	IP routing	Static routing
	Network diagnostics	Ping, route tracing (traceroute), DNS
Serial Modem	Operating mode	NET, HTTPD
	Sockets	4 sockets, 4 centers, TCPS(SOCKA)/TCPC/UDPS/UDPC
	Modbus RTU - Modbus TCP	Supported
Device Management	Configuration	Web
	Remote management	Telnet, SSH, AT command, SNMP
Security	Backup connection (Failover)	Automatic switching between 4G and WAN, provides automatic switching to alternative backup connection
	Firewall	DMZ, Anti-DoS, Filtering (IP/Domain name/MAC), Port forwarding, Access control
	VPN	PPTP, L2TP, GRE, IPSEC (IKEv1), OPENVPN
Services	DDNS	Remote access to the device via domain name
	Alarm	Email, SMS
	Other	NTP client, Scheduled task